Cordyceps mushroom (Cordyceps Sinensis) is widely used as an Athletes tonic. It replenishes “yin jing” and is used to strengthen the body and mind at a fundamental level. Traditionally, cordyceps has been used to improve weakness, impotence and fatigue associated with aging, because of the mushrooms wide-ranging ability to adjust the flow and levels of Qi. Cordyceps has been seen as a guardian of respiratory health for more than a thousand years. Much of its reputation for protecting the lungs is believed to come from its ability to promote enhanced oxygen utilization efficacy. Know to increase stamina and athletic performance. Strengthens kidneys and adrenals. Increase cellular oxygen absorption whilst enhancing immune-system and increasing sexual function and libido.